package y23.May;

import java.util.Scanner;

public class SliceForest {
    public static void main(String[] args) {
        double S;
        Scanner sc = new Scanner(System.in);
        int i = 1;
        while(i<10){
            double L = 1.9 + 2 * 3;
            double R = 0.65 * 4;
            System.out.println("请输入太阳高度角");
            double elevatingAngle = sc.nextDouble()/180*Math.PI;//太阳高度角//q's'd
            S = 0.5 * L * R /Math.tan(elevatingAngle);
            System.out.println(S);
        }
    }
}
